Appeal No. 1997-0530
Application 08/312,493
Takekoshi’s teaching regarding heat distortion is that the
disclosed polyarylene sulfide block copolymers have a
significantly improved heat distortion temperature compared to
polyarylene sulfide homopolymers (col. 1, lines 35-41). Thus,
contrary to the examiner’s argument, the reference does not
teach that use of two distinct polysiloxanes in combination
improves heat distortion properties.
Because the examiner has not provided a convincing
explanation as to why Takekoshi would have fairly suggested,
to one of ordinary skill in the art, modifying Haubennestel so
as to arrive at appellants’ claimed invention, we reverse the
rejection under 35 U.S.C. § 103 over this combination of
references.3
DECISION
The rejections of claims 1, 4, 7-11 and 13-22 under
3The examiner applies Haubennestel in view of Takekoshi
and Preston to dependent claim 14, but does not rely upon any
teaching in Preston which remedies the above-discussed
deficiency in the combined teachings of Haubennestel and
Takekoshi.
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